Stop for revolving doors or turnstiles



T. P. FISHER. STOP FOR REVOLVING DOORS 0R TURNSTILES.

APPLICATION FILED OCT- II, 1919.

Patented Jan. 4, 1921.

PATENT OFFICE.

UNITED STATES THOMAS P. FISHER, OF SOMERVILLE, H ASSACHUSETTS.

STOP FOR REVOLVING DOORS OB TURNS'IILES.

5 State of Massachusetts, have invented certain new and usefulImprovements in Stops for-Revolving Doors or Turnstiles, of which thefollowing is a specification.

This invention relates to revolving ole sures and more particularly to anovel form of turnstile or door especially adapted for use at theentrance or exit of a subway or; elevated railway station or similarplace for controlling the passage of pedestrians therethrough.

The object of the invention is toprovidev means for momentarilyarresting or checking the opening movement of the turnstile at thequarter turn and means for preventing rearward rotation of saidturnstile whereby pedestrians are compelled to pass through theturnstile one at a time and are prevented from returning through thesame entrance or exit.

The invention further aims to provide a revoluble door or turnstilehaving a checking or retarding device mounted on the arms thereof and soconstructed that when the door or turnstile is revolved rapidly, therotation thereof will be automatically checked at the quarter turn andwhen the turnstile is revolved slowly the retarding device will berendered inoperative, as such, and permit the p turnstile to make acomplete revolution without interference.

The invention further contemplates a retarding device operable uponquick turning movement of the" turnstile to automatically check or stopthe rotation thereof and rendered inactive for this purpose when thespeed of the turnstile is reduced.

A still further object of the invention is generally toimprove thisclass of devices so as to increase their utility and efliciency.

In the drawings: I Figure 1 is a perspective view of a turnstileequipped with the present invention.

Fig. 2 is a front elevation of the keeper for theretarding device,showing in section the position of the terminal of the retarding deviceas it travels within the groove of the keeper and in dotted lines thepositions assumed by said retarding device as it strikes the abutment. I

Fig. 3 is a side elevation partly in section showing in full lines theposition of the re- Specification of Letters Patent.

Patented Jan. 4, 1921.

Application filed October 11, 1919. Serial No. 380,005.

tarding device as it enters the groove and in dotted lines the positionof said retarding device as it is about to drop by gravity. I

Fig. 4 is a front elevation illustrating a modified form of keeper.

Fig.- 5 is a similar view illustrating a. further modification, and

Fig. 6 is a detail perspective view illustrating a still furthermodification. The improved device forming the subect matter of thepresent invention is applicable to revolving doors,'turnstiles and otherclosures used at the entrance or exit of a subway, elevated railwaystation or similar place for controlling the passage of pedestrianstherethrough and by way of illustration is shown in connection with aturnstile of the ordinary construction in which 5 designates therotating post or standard and 6 the arms or contact members radiatingtherefrom and preferably four in number although any desired number ofarms may be employed, as will be readily understood. The post orstandard 5'-- is spaced from a suitable support 7 to form an exit orentrance passageway indicated at 8 Y and secured in any suitable mannerto the support 7 is a keeper 9. The keeper 9 preferably comprises a.flat elongated plate havdefining a stop orabutment 13. The large end ofthe lower block 11 is spaced from the abutment 13 to form a groove orpassage 14, said large end being provided with a straight face 15constituting a stop or abutment.

The upper faces of the outer ends of the arms 6 are preferably cut awayto form seats 16 and mounted on the .outer ends of the arms at saidseats are retarding devices 17 which coact with the stops or abutments.'13 and 15 for the purpose of arresting the forward rotary movement ofthe turnstile at the quarter turn and for preventing rearward rotationofsaid turnstile, as will be more fully ex lained hereinafter. theretarding evices 17 is preferably mounted on each arm 6 of the turnstileand each retarding device comprises a flat bar or extension having itsrear end hinged or other One of 4 by gravity as soon as the terminals 19thereof engage the abutments 13.

It will thus be seen that as the turnstile is rotated in the directionof the arrow indicated in Fig. 1 of the drawings, the cylindricalterminal 19 of the adjacent retarding device will ride up the inclinedwalls of the groove 12 until the terminal 19 strikes the abutment 13when the forward rotation of the turnstile will be momentarily arrested.When the terminal 19 strikes the abutment 13 the retarding device 17will drop by gravity to'the dotted line osition shown'in Fig. 2 of thedrawings and by en gagement with the abutment 15 effectually reventrearward rotation of the turnstile. t will furthermore be noted that ifthe turnstile is rotated rapidly it will be automatically stopped orretarded at the quarter turn but if the momentum of the turnstile isreduced the terminals 19 of the retarding devices will ride evenly overthe walls of the groove 12 and permit complete rotation of the turnstilewithout affecting the retarding devices. Inasmuch as the movement of theturnstile is automatically checked or stopped at each quarter turnthereof, pedestrians are permitted to pass through the entrance or exit8 one at a time only and, owing to the engagement of the terminals 19with the abutments 15, rearward rotation of the turn stile is preventedso that the pedestrians cannot return by the same exit or entrance. Ifdesired, a suitable spring may be used in conjunction. with eachretarding device to assist in returning said retarding device toinoperative position, but it is preferred that the retarding device beof sufiicient weight to return by gravity without the employment of suchsprings.

In Fig. 4 of the drawings there is illustrated a modified form of theinvention in which a strip of metal 20' is secured to the' upper wall ofthe guiding groove 12 with its free end bent downwardly to form a springabutment 21. This construction prevents undue strain and jar on the armsof the pivotally mounted on a screw or bolt 24 at one side of said arm,theconstruction and operation of the device being otherwise simi lar tothat shown in Fig. 1.

It will thus be seen that the retarding device is operable upon quickturning movement of the turnstile to automatically check or stop theforward rotation thereof and is renderegl inactive for this purpose whenthe speed of the turnstile is reduced. The device may be made indifferent sizes and shapes and, if desired, one of the keepers 9 may beprovided for each arm of the turnstile.

Having thus described the invention what is claimed as new is:

1. The combination of a revoluble barrier having spaced manuallyoperated contact members, of retarding means therefor constructed toautomatically retard the forward movement of any contact member at apredetermined point when moved rapidly but permitting unchecked movementpas saidpoint when moved slowly.

2. The combination of a revoluble barrier having spaced manuallyoperated contact members, of retarding means therefor constructed toautpmatically retard the forward movement of any contact member at a'predetermined point when moved rapidly but permitting uncheckedmovement past said point when moved slowly and also preventing reverserotation of said barrier.

3..A barrier comprising -a turnstile having arms, a keeper having fixedspaced abutments, movable means on the arms constructed to engage oneabutment when reforvertical swinging movement on the arm' andprovidedwith a terminal adapted to enter the guiding groove and bearagainst one of the'abutments when the arm is revolved rapidly butpermitted to freely pass said abutment when revolved slowly, the otherabutment cooperating with said retarding device to prevent reversemovement of said arm.

5. A barriercomprising a turnstile having arms, a, keeper a'vinganupwardly inclined guiding groove and spaced abutments, and retardingdevices carried by the arms v of the turnstile and movable through theguiding groove into contact with one abutment when said arms arerevolved rapidly but permitted to freely pass said abutment whenrevolved slowly, the other abutment cooperating with said retardingdevices to prevent reverse movement of said arms. a

6. A barrier comprising a fixed part and a turnstile spaced from saidfixed part to form a passageway and having radiating barrier arms, akeeper secured to the fixed part and comprising upper and lowermembersspaced apart to form an upwardly inclined guiding groove and spacedabutments disposed one in advance of the other, and retarding armspivotally mounted on the barrier arms and each havin sion movable withinthe guiding gLQQVB and into engagement with one of said abutiments whenthe barrier arms are revolved rapidly but permitted to freely pass saidabutment when revolved slowly, the other abutment cooperating with saidretarding arms to prevent reverse movement of said barrier arms.

7 The combination with a fixed part, of a turnstile spaced from thefixed part to form a passageway and having radiating barrier arms, akeeper secured to the fixed part and including upper and lower membersspaced apart to form an upwardly inclined guiding groove, the lowermember of the keeper being formed with a flat face constituting anabutment and the upper member of the keeper being provided with adepending portion having a flat face constituting an abutment, andretarding arms pivotally mounted for vertical swinging movement on thebarrier arms and each havingone end thereof extended longitudinallybeyond the adjacent barrier arm and provided with a reduced terminalmovable through the groove in the keeper and in contact with oneabutment when revolved an exten rapidly but permitted to freely passsaid abutment when revolved slowly, the other abutment cooperating withsaid retarding arms to prevent reverse movement of the barrier arms. a

8. The combination with a fixed part, of a turnstile spaced from thefixed part to form a passageway and provided with barrier arms, a keepersecured to the fixed part and provided with a guiding groove and spacedabutments disposed one in advance of the other, retarding arms pivotallymounted on the barrier arms and provided with extensions movable withinthe guiding groove for contact with the abutments, and yokes spaced from.and extending transversely across the retarding arms for limiting theupward swinging movement thereof. 9. The combination with a fixed part,of a turnstile spaced from the fixed part to form a passageway andprovided with radiating arms each having a portion thereof cut away toform a seating recess, a keeper secured to the'fixed part and providedwith an upwardly inclined guiding groove and spaced abutmentsdisposedone in advance of the other, retarding arms pivotally mounted onthe barrier arms at said recesses and each having one end thereofprojected longitudinally beyond the barrier arms to form a reducedextension movable through the groove and into engagement with one of theabutments for limiting the forward turning movement of the turnstile andinto engagement with the other abutment for limiting the rearwardmovement of said turnstile, and means carried by the barrier arms andextending transversely across the retarding arms for' limiting theupward swinging movement thereof.

In testimony whereof I aflix my signature.

THOMAS P. FISHER. 1,. 8.

